High Q, precision SC cut resonators with low acceleration sensitivity

Author

Haskell, R.B. ; Morley, P.E. ; Stevens, D.S.

Author_Institution

Vectron Int.-Hudson, Hudson, NH, USA

fYear

2002

fDate

2002

Firstpage

111

Lastpage

118

Abstract

A new mounting structure has enabled the construction of high Q resonators with very low acceleration sensitivity. Values in the range of mid parts in 10¹¹ to low parts in 10¹⁰ per g have been achieved with a simple planar support structure. Utilizing a thin chemically etched lead-frame, a four-point mount with built in stress relief has been designed to mount in the plane of the resonator. The advantages of this structure include good symmetry, minimal residual manufacturing stresses, and minimal asymmetric vibratory stresses. Many different configurations have been designed and built using 8 and 10 mm 10 MHz 3^rd overtone SC cut plano-convex crystals with excellent results.

Keywords

Q-factor; acceleration; crystal resonators; internal stresses; packaging; sensitivity; stress effects; symmetry; vibrations; 10 MHz; 10 mm; 8 mm; QRM; asymmetric vibratory stresses; chemically etched leadframe; g-sensitivity; high Q precision SC cut resonators; low acceleration sensitivity; planar support structure; quad relief mount; quartz crystal resonators; residual manufacturing stresses; stress relief mount; symmetrical structure; third-overtone SC cut plano-convex crystals; vibration; Acceleration; Chemicals; Crystals; Degradation; Etching; Manufacturing processes; Performance analysis; Residual stresses; Resonant frequency; Stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency Control Symposium and PDA Exhibition, 2002. IEEE International

Print_ISBN

0-7803-7082-1

Type

conf

DOI

10.1109/FREQ.2002.1075866

Filename

1075866